Datasheet

Chapter 10 Analog-to-Digital Converter (S08ADC12V1)
MC9S08DZ60 Series Data Sheet, Rev. 4
194 Freescale Semiconductor
ADCSC1 = 0x41 (%01000001)
Bit 7 COCO 0 Read-only flag which is set when a conversion completes
Bit 6 AIEN 1 Conversion complete interrupt enabled
Bit 5 ADCO 0 One conversion only (continuous conversions disabled)
Bit 4:0 ADCH 00001 Input channel 1 selected as ADC input channel
ADCRH/L = 0xxx
Holds results of conversion. Read high byte (ADCRH) before low byte (ADCRL) so that
conversion data cannot be overwritten with data from the next conversion.
ADCCVH/L = 0xxx
Holds compare value when compare function enabled
APCTL1=0x02
AD1 pin I/O control disabled. All other AD pins remain general purpose I/O pins
APCTL2=0x00
All other AD pins remain general purpose I/O pins
Figure 10-13. Initialization Flowchart for Example
Ye s
No
Reset
Initialize ADC
ADCCFG = 0x98
ADCSC1 = 0x41
ADCSC2 = 0x00
Check
COCO=1?
Read ADCRH
Then ADCRL To
Clear COCO Bit
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